[Info-vax] Was the RECALL command limited to 8 entries in a much earlier version of OpenVMS?

[Arne Vajhøj]

On 12/21/2022 5:41 PM, alanfe... at gmail.com wrote:
> On Wednesday, December 21, 2022 at 11:44:45 AM UTC-5, Volker Halle wrote:
>> alanfe... at gmail.com schrieb am Mittwoch, 21. Dezember 2022 um 12:56:13 UTC+1:
>>> Maybe it was limited to 24?
>>  From OpenVMS V7.1 User Manual (NOV-1991):
>>
>> On OpenVMS VAX systems, the recall buffer holds up to 20 previously entered commands.
>> On OpenVMS Alpha systems, the recall buffer holds up to 254 previously entered commands.
>>
>> Command line recall seems to have been introduced in V6.2
> 
> Wow, as late as 6.2 on VAX it was only 20 previous commands!
> 
> Introduced in V4.4 or earlier.

I seem to recall (pun intended!) that it was like:

before - buffer usually had way more than 20 commands but recall command 
only showed the last 20

after - byte size of buffer was increased and recall command shows what 
was actually there

correct?

I have an old code fragment:

         movl    #CTL$AG_CLIDATA,r0
         movl    W^PPD$L_PRC(r0),r0
         moval   W^PRC_G_COMMANDS(r0),r0
         movc3   #PRC_C_CMDBUFSIZ,(r0),(r1)

Was PRC_C_CMDBUFSIZ increased from like 256 to like 1024?

Arne